Convert a Normal HACMP VG to Scalable/ BIG VG

Hi, I would like to convert a Normal HACMP VG into Scalable or BIG VG as we have reached 1TB Space and not much oppurtunity to re-org disks. I have decided to take a downtime and convert it. But however I have few questions. 1. Which one is preferable Scalable or BIG VG? 2. Will Scalable / BIG VG work on HACMP 5.3.0.0. 3. What are the steps to convert the VG? Please help me. Thanks Ram

I use the BIG VG with HA but I haven't had to look at Scalable. But you can only set the BIG VG parameter when the VG is created. And probably the Scalable too but you'd have to check with support on that.
Here's a good guide for you to look at and should give you an idea of which VG type you need. http://www.ibm.com/developerworks/aix/library/au-aix5l-lvm.html Good luck.